32 EQUINE ANATOMY. 



the posterior radial artery ; 4 — the principal artery of 

 the coraco radialis, dipping into that muscle by ascend- 

 ing and descending branches. 



Anterior radial artery passes in front of the 

 elbow joint, under the flexor muscles of the fore-arm 

 and of the anterior extensor metacarpi, to the anterior 

 face of the radius, to the knee, where it looses itself by 

 anastomosing with tlie posterior radial and the inter- 

 osseous of the fore-arm. 



Posterior radial artery runs down under the in- 

 ternal ligament of the elbow joint, under the internal 

 flexor of the metacarpus, arrives at the inferior extrem- 

 ity of the radius, and terminates by the common trunk 

 of the interosseous metacarpal and the collateral of 

 the cannon. Its collateral brandies are : 1 — articular 

 branches ; 2 — muscular braiK^hes to tlie posterior anti- 

 brachial muscles ; 3 — interosseous of the fore-arm, 



which runs through the radio cubital arch under the 



I* 

 extensor suffraginis ; 4 — small muscular and musculo- 

 cutaneous branches ; 5 — branches to the posterior face 

 of the radius. 



Common trunk of the interosseous metacarpal. — 

 Passing inwards and behind the carpus, it reaches the 

 head of the internal small metacarpus, bends outwards 

 under the superior extremity of the suspensory liga- 

 ment, and anastomoses witli a branch from the super- 



